Cutter for dredgers



(No Model.)

t e e h S m e e h s 2 S B T A B L CUTTER FOR DREDGERS, EXGAVATOBS, 8w.

Paten ted Sept m: cams Prrzns co. PHOTO-LIYHD.. wasnmown. 0. c4

(No Model.) 2 Sheets- Sheet 2.

L.' W. BATES.

CUTTER FOR DRBDGERS, BXGAVATORS, &o.

N0.526,514. P te tedse trzsgsg l.

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UNITED STATES PATENT OFFICE.

LINDON W. BATES, OF CHICAGO, ILLINOIS;

CUTTER FOR DREDGERS, EXCAVATORS, 800.

SPECIFICATION forming part of Letters Patent N 0. 526,514, datedSeptember 25, 1894.

Application filed March 13,1894.- Serial No. (N0 modem To all whom itmay concern:

Be it known that I, LINDON W. BATES, a

citizen of the United States, residing at Chicago, in the county of Cookand State of Illi- 1101s, have invented certain new and usefulImprovements in Cutters for Dredgers, Excavators, &c., of which thefollowing is a specition of my improved cutter; Fig. 2, a side view;Fig. 3, a longitudinal sectional view; Figs. 4 and 5, face and edgeviews of the head or disks; Figs. 6,7, 8 and 9,detail views of theknives, and Figs. 10, 11 and 12, views illustrating certain details.

A A represent two circular heads or disks, made from a single piece ofsteel, with substantially radial arms or spokes at, whose outer ends arebent laterally to form aseries of peripheral flanges b; and also formedwith a central hole or orifice c to fit upon the end of the rotatablepipe-section B. These heads are connected by means of longitudinalknives C of the form shown in Figs. 1, 2, 3, 6, 7, 8 and 9. The knivescomprise a straight and flat main body portion d, from which projectsupwardly and forwardly the cutting edge f,-the said main body and thecutting edges or surfaces being carried downward at the ends so as toembrace between such ends, the arms or spokes a of the heads to whichthey are riveted or bolted.

It will be noticed by reference to Figs. 3, 7, 8, and 9, that at theinner corners of the knives they are recessed, as at g, to afford a goodseat for the flanged or bent ends b of the arms a, and that the mainbody of the knives projects downward between the inner ends of theflanges 1), thereby eflectually preventing the outer disk or head frombeing forced toward the inner head or disk when the cutter is doingend-work. The knives shown in these figures are made of cast steel, butwhere they are made of forged boiler-plate, the heads or disks willfirst be connected by plates or strips h, Fig. 10,'and the knivesriveted to said strips as well as to the flanged spokes.

When the knives are applied to the heads or disks, the cutting edge ofone should be about five inches (in a cutter of a diameter of five feet)in rear of the back edge of the knife next in front, so as to affordample space for the loosened material to enter the interior of thecutter. If the cutting edge or flange were of the same width, from frontto rear throughout its length, the spaces or openings between the arms0. would be covered or closed too much, so, in order to avoid this, andleave as much space as possible for the material to enter, the cuttingedges of the knives taper or incline backward at the ends so that whenlooking at the end of the cutter (Fig. 2), the forward edge of the endsof the knives appears parallel with the rear edge of the knife next infront. In order to increase the suction and the delivery of the materialto the suction pipe, I provide said pipe or the cutter With a funnelD,shown in dotted lines in Fig. 3 and in full lines in Figs. 11 and 12,-which has its outer end flared slightly.

This reversible cutter may, if desired, be applied to or mounted upon afixed suction pipe, as in Fig. 11, in which case the pipe will beprovided with a longitudinal bearing for the cutter-rotating shaft E. Byemploying this rotating shaft I am enabled to use in connection with thefunnel D, a conical directing head F which, in the present instance,forms the connection between the shaft and the cutter. The apex of thiscasting extends into or toward the funnel, and thereby effectuallyincreases the suction and proper discharge of the material. The funneland the casting do do not interfere with the reversibility of thecutter,-it being only necessary in reversing the cutter to place thecasting in the place of the funnel, and the funnel in the place of thecasting. If desired, the funnel may be secured to and carried by thefixed suction pipe, as in Fig. 12, instead of being carried by thecutter as in Figs. 3and 11.

As the knives are formed alike at opposite ends, and as the heads ordisks are similar in all respects, the cutter as a whole may be takenoff the suction pipe and reversed end for end, and thus bring intoaction a new set of end-cutters.

The central opening in the outer disk or head will be gratedor screenedby bars 1', or

axially in line with the funnel, substantially as shown and described.

at. In combination with a fixed suction pipe; a reversible cutter; acutter-operating shaft having a separate conical casting thereon; and anopen ended funnel axially in line with the casting and the suction pipe.

. 5. In combination with the flanged heads or disks, the knivesextending from one head to the other, and recessed where they fit uponthe flanges.

6. In combination with the flangd'lieads or disks, the knives extendingfrom one head to the other and partially overthe outer faces of saidheads.

7. In combination with heads A A having the separated flanged arms a,the knives extending from one head to the other, and having their endsapplied to the outer faces of said arms.

8. In combination with heads A having arms a, the knives having theforwardly-projecting cutting ed ges,the said cutting edges receding orinclining, backward at the ends of the knives.

9. In combination with twoheadsA A, having arms a whose outer endsai'efla'nged or bent; the knives extending from one head to the otherwith a portion of the main body of said knives between the opposing endsof the arms.

In witness whereof Iherennto set my hand in the presence of twowitnesses.

LINDON WV. BATES.

Witnesses:

OHAs. H. WHITE, R. N. FOWLER.

